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Re: Program to check for valid names

From Ben Bacarisse <ben.usenet@bsb.me.uk>
Newsgroups comp.lang.c
Subject Re: Program to check for valid names
Date 2017-01-14 15:02 +0000
Organization A noiseless patient Spider
Message-ID <87inphn0r9.fsf@bsb.me.uk> (permalink)
References <d715c9db-3c6c-437d-aeb4-ba7eaefce4db@googlegroups.com>

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Alla _ <modelling.data@gmail.com> writes:

> Given the amount of valuable advice I get here, and the amount
> and quality of knowledge I acquire here, I have decided to run the
> following piece by you to get your opinion on the structure and the
> logic. I am afraid to loose those tiny seeds of improvement, if I 
> go on writing my little program completely on my own, only occasionally 
> asking for help with some pieces.
>
> Please, take a look at this little part of the program. 
>  
>  The goal of this little part is to read all lines from a file, and
>  upon reading each line check if it doesn't start with a number,

Why does that matter to you?

>  and, if it doesn't, then copy each valid character into another
>  buffer by calling function check_input_names; this function should
>  check the buffer for valid characters, and if there are any, copy
> them into another place, and then call the function, which checks
> if copied names can be found in the array of valid names; at the end
> return the address of the first invalid character in the buffer (I need it
> to be so).

This is not the right way to perform the overall goal of checking for a
valid name for some fixed list of names.

The key function to look up is strncmp and then you can avoid all the
copying of data.

<snip>
-- 
Ben.

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Thread

Program to check for valid names Alla _ <modelling.data@gmail.com> - 2017-01-14 04:35 -0800
  Re: Program to check for valid names Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-01-14 15:02 +0000
    Re: Program to check for valid names Alla _ <modelling.data@gmail.com> - 2017-01-14 07:29 -0800
      Re: Program to check for valid names supercat@casperkitty.com - 2017-01-14 10:17 -0800
      Re: Program to check for valid names Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-01-14 18:29 +0000
        Re: Program to check for valid names Alla _ <modelling.data@gmail.com> - 2017-01-16 02:16 -0800
          Re: Program to check for valid names Richard Heathfield <rjh@cpax.org.uk> - 2017-01-16 11:40 +0000
            Re: Program to check for valid names Alla _ <modelling.data@gmail.com> - 2017-01-16 03:50 -0800
              Re: Program to check for valid names Alla _ <modelling.data@gmail.com> - 2017-01-16 04:21 -0800
                Re: Program to check for valid names Richard Heathfield <rjh@cpax.org.uk> - 2017-01-16 12:56 +0000
                Re: Program to check for valid names Richard Heathfield <rjh@cpax.org.uk> - 2017-01-16 12:59 +0000
                Re: Program to check for valid names Alla _ <modelling.data@gmail.com> - 2017-01-16 05:03 -0800
                Re: Program to check for valid names Richard Heathfield <rjh@cpax.org.uk> - 2017-01-16 13:06 +0000
                Re: Program to check for valid names Alla _ <modelling.data@gmail.com> - 2017-01-16 06:40 -0800
                Re: Program to check for valid names Richard Heathfield <rjh@cpax.org.uk> - 2017-01-16 15:03 +0000
                Re: Program to check for valid names Alla _ <modelling.data@gmail.com> - 2017-01-16 08:29 -0800
                Re: Program to check for valid names Richard Heathfield <rjh@cpax.org.uk> - 2017-01-16 16:42 +0000
                Re: Program to check for valid names Alla _ <modelling.data@gmail.com> - 2017-01-16 09:03 -0800
                Re: Program to check for valid names Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-01-16 17:17 +0000
                Re: Program to check for valid names Richard Heathfield <rjh@cpax.org.uk> - 2017-01-16 17:20 +0000
                Re: Program to check for valid names Alla _ <modelling.data@gmail.com> - 2017-01-16 09:26 -0800
                Re: Program to check for valid names Richard Heathfield <rjh@cpax.org.uk> - 2017-01-16 17:18 +0000
                Re: Program to check for valid names Alla _ <modelling.data@gmail.com> - 2017-01-16 09:23 -0800
                Re: Program to check for valid names Richard Heathfield <rjh@cpax.org.uk> - 2017-01-16 17:30 +0000
                Re: Program to check for valid names Alla _ <modelling.data@gmail.com> - 2017-01-16 06:42 -0800
                Re: Program to check for valid names Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-01-16 16:23 +0000
                Re: Program to check for valid names Alla _ <modelling.data@gmail.com> - 2017-01-16 08:46 -0800
                Re: Program to check for valid names Alla _ <modelling.data@gmail.com> - 2017-01-16 09:33 -0800
                Re: Program to check for valid names Richard Heathfield <rjh@cpax.org.uk> - 2017-01-16 17:37 +0000
                Re: Program to check for valid names Alla _ <modelling.data@gmail.com> - 2017-01-16 09:54 -0800
                Re: Program to check for valid names Alla _ <modelling.data@gmail.com> - 2017-01-17 03:44 -0800
                Re: Program to check for valid names Barry Schwarz <schwarzb@dqel.com> - 2017-01-17 08:16 -0800
                Re: Program to check for valid names Alla _ <modelling.data@gmail.com> - 2017-01-18 10:21 -0800
                Re: Program to check for valid names Alla _ <modelling.data@gmail.com> - 2017-01-18 10:32 -0800
                Re: Program to check for valid names Richard Heathfield <rjh@cpax.org.uk> - 2017-01-18 19:38 +0000
                Re: Program to check for valid names Alla _ <modelling.data@gmail.com> - 2017-01-18 12:52 -0800
                Re: Program to check for valid names Barry Schwarz <schwarzb@dqel.com> - 2017-01-18 18:52 -0800
                Re: Program to check for valid names Alla _ <modelling.data@gmail.com> - 2017-01-20 02:00 -0800
                Re: Program to check for valid names Barry Schwarz <schwarzb@dqel.com> - 2017-01-20 12:09 -0800
                Re: Program to check for valid names Alla _ <modelling.data@gmail.com> - 2017-01-20 02:45 -0800
                Re: Program to check for valid names Barry Schwarz <schwarzb@dqel.com> - 2017-01-20 12:24 -0800
                Re: Program to check for valid names Alla _ <modelling.data@gmail.com> - 2017-01-21 09:02 -0800
                Re: Program to check for valid names Barry Schwarz <schwarzb@dqel.com> - 2017-01-18 18:05 -0800
                Re: Program to check for valid names Barry Schwarz <schwarzb@dqel.com> - 2017-01-16 10:23 -0800
                Re: Program to check for valid names Alla _ <modelling.data@gmail.com> - 2017-01-16 23:03 -0800
                Re: Program to check for valid names Barry Schwarz <schwarzb@dqel.com> - 2017-01-17 00:19 -0800
  Re: Program to check for valid names Barry Schwarz <schwarzb@dqel.com> - 2017-01-14 18:23 -0800

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